why?

[stustag]

As you all know I changed my brake master cylinder and bleed the brakes Yesterday, so this morning we all headed off to Ludlow then we were going to visit Big J but!

As we drove to Ludlow the steering wheel started shaking around 35-40 mph, I stopped to check the wheels (Nick's 3 loose wheel nuts came to mind!) but all was well.

I got to Ludlow and had the front wheels checked for Balance which they found were slightly out but not much. After the wheels had been balanced the shake was not as bad but was still there slightly at 30-40 mph but I also noticed some shake when braking hard!:shock:

I could not feel judder or pulsing through the pedal but some shaking through the steering wheel.

What do you all think this could be as the shake was not there before the master cylinder failed or is it due to better brake performance since the new was fitted?

Stuart

PS Sorry J I did not want to risk the journey to Wellington with the precious one's aboard!

[Guest]

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Stuart,are the pistons in the calipers re tracting far enough now you have fitted the master cylinder? Check the calipers dont have any play in them.
p.s i had a great run out your way today!
Jason

[Andrew S]

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Stuart

Is there a possibility that there is air in one side of the one of the front calipers? There may be good braking from both sides, hence why the brakes do not pull in a direction? The reason why I say this is, if there was air at all, then perhaps, one of the brake pistons is not being hydraulically being pulled back off the disc and when braking, the good piston is able to push on the wheel bearing.

Hope that makes sense

Andrew

[Big J]

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Stuart - sorry you couldn't make it but I'mhappier knowing that everyone got home safe and sound. I'm sure someone will offer a soulution to the problem soon.

Better luck next time eh?!

rgds

J

[Stagdad]

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Stu

Are you saying it is shaking with out the brakes being used?If so it's unlikly to be because of the master cylinder change.

Any play in the wheel bearings?

Strange one this

Steve

[stustag]

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Nowthe wheels have been balanced the shake happens slightly when driving and more pronounced when braking. It must be connected to something I did Yesterday so I will investigate the calipers tomorrow.

Stuart

[Andrew S]

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Normally the bottom end shake on steering is the lower swivel joints.

Uneven tyre pressures?

Steering column to rack uj's OK?

Let us know

Andrew

[Andrew S]

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Normally the bottom end shake on steering is the lower swivel joints.

Uneven tyre pressures?

Steering column to rack uj's OK?

Let us know

Andrew

[GDPR]

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Didn't get any fluid on the disc when you were bleeding them did you?

[sax player]

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Hi Stuart.

look to your wheel nuts and how they are locating the wheel. On fastening the wheel you should only finger tight the nuts first and then do opposite nuts together. spin the wheel to centralise it then re tighten , opposites together.

I suffered this for years untill i looked at the wheel and found the holes had became elongated.( i have stainless nut that dont have a chamfer to centralise, they rely on a good fit along the nut length). i got over this by using gas ptfe tape to act as a chamfer.

shaun

[Andy Rundell]

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Andrew S wrote:

Normally the bottom end shake on steering is the lower swivel joints.

When i suffered from this it was the lower swivel joints......

cheers.....Andy

[jamcarr2]

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Don’t believe it !I too changed most of my braking system new copper pipes all round re-conditioned master cylinder changed brake fluid . Went out yesterday and had constant wheel judder between 30 -40 not to bad but visible shaking of the steering wheel if you let go of it and wheel judder under heavy braking .I had this problem when I first got the car but I changed the inner and outer ball joints and had the wheels tracked and balanced this stopped it and it has been great ever since until yesterday . I have-not had time to investigate yet but hope to have a good look tomorrow in the mean time if you come up with some thing please let me know . I don’t see how it could be the brakes could it ?

John

[StagnJag]

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I had a shake at 40-50 when I bought mine. Replacing theold 1985 tyres solved my shake (Well the vast majority of it anyway!).

Dave

[mickl]

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Stuart



Just had a similar problem on my everyday 3 series bmw, one of the calipers was seized and was binding on disc, causing the disc to turn blue from heat, both calipers.discs and pads have been replaced along with brake fluid.

If calipers have been binding I would advise replacement of brake fluid as there is a possibility it has boiled.



Good luck



Mick l

[european voyager]

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Chech for wear on the track control arm bushes , thats where my shudder came from. If its been jacked up at the front it could have settled on the suspension differently and is now showing a wobble.